Duct Fan Speed Adjuster

Milwaukee PH600 PH Tester pH Tester With 1 Point Manual Calibration The Milwaukee Instruments pH Pen, PH600 is an easy to use pH meter. It features +- 0.2 Accuracy, one-point calibration and a long battery life (approx.700 hours of continuous use). Calibration Solution not included. List Price: $ 19.50 Price:…